Denitration feeding device and denitration system

Abstract

The invention relates to the technical field of denitration equipment, in particular to a denitration feeding device and a denitration system.The denitration feeding device comprises a conveying assembly, a feeding assembly and a storage bin, the feeding assembly comprises a plurality of material stirring components, the multiple material stirring components are arranged at an outlet of a discharging bin at intervals, preset intervals are formed between the multiple material stirring components, and the conveying assembly comprises a conveying assembly, a feeding assembly and a storage bin; an outlet of the storage bin faces the conveying assembly, a feeding assembly is arranged at the outlet of the storage bin so that materials in the storage bin can be conveyed to the conveying assembly, the conveying assembly comprises a conveying component and a pressure monitoring part, the input end of the conveying component faces the outlet of the feeding assembly, and the pressure monitoring part is arranged on the conveying component so as to monitor the weight of the received materials. According to the denitration feeding device, the feeding amount is convenient to adjust, and the denitration stability is improved.

Description

Technical Field

[0001] This application relates to the technical field of denitration equipment, and particularly to a denitration feeding device and a denitration system. Background Art

[0002] Urea thermal decomposition denitration is one of the technical routes of SCR denitration. During the use of the core equipment, the pyrolysis furnace sometimes experiences agglomeration and adhesion of the denitration agent, resulting in unstable feeding. In severe cases, it will cause blockage in the flue gas pipeline, leading to a reduction in air volume and insufficient ammonia supply in the system, and thus it needs to be cleaned in time. This will lead to instability in the function of the denitration system and affect denitration. Summary of the Invention

[0003] This application provides a denitration feeding device, which is convenient for adjusting the feeding amount and improving the stability of denitration.

[0004] This application provides a denitration feeding device, including: a feeding assembly and a storage bin. The feeding assembly includes a plurality of feeding members, and the plurality of feeding members are arranged at intervals at the outlet of the discharging bin, and a preset distance is provided between the plurality of feeding members;

[0005] A conveying assembly, the outlet of the storage bin faces the conveying assembly, and a feeding assembly is provided at the outlet of the storage bin to convey the materials in the storage bin onto the conveying assembly. The conveying assembly includes a conveying member and a pressure monitoring member. The input end of the conveying member faces the outlet of the feeding assembly, and the pressure monitoring member is arranged on the conveying member to monitor the weight of the received materials.

[0006] This application provides a denitration feeding device, which is convenient for adjusting the feeding amount and improving the stability of denitration.

[0007] In some embodiments, the feeding assembly further includes a vibration member, the vibration member is connected to the storage bin, the output end of the vibration member extends into the storage bin, and the vibration member is any one of an ultrasonic transducer, a vibrator or an air cannon.

[0008] In some embodiments, the number of the vibration members is multiple, and the multiple vibration members are arranged at intervals in the vertical direction on the storage bin.

[0009] In some embodiments, the conveying member is a chain conveyor.

[0010] In some embodiments, the conveying assembly further includes an intake pipe, a booster fan, a first pipe, a second pipe and a return pipe. The output end of the booster fan is connected to the inlet of the intake pipe, the outlet of the intake pipe is respectively connected to one ends of the first pipe and the second pipe, the other ends of the second pipe and the first pipe are connected to the return pipe, and the output end of the chain conveyor is connected to the first pipe to input the materials into the first pipe.

[0011] In some embodiments, the denitration feeding device further includes a flow regulating component, which is arranged on the first pipe and is arranged near one end of the connection between the first pipe and the air inlet pipe.

[0012] In some embodiments, the denitration feeding device further includes a grinding component, which is arranged inside the second pipe or at the connection between the first pipe and the return air pipe. The grinding component is arranged below the connection between the output end of the apron feeder and the first pipe to grind the material.

[0013] In some embodiments, the denitration feeding device further includes a temperature monitoring component, which is arranged on the first pipe to monitor the flue gas temperature inside the first pipe.

[0014] In some embodiments, the number of the pressure monitoring components is multiple, and the multiple pressure monitoring components are arranged at intervals in the width direction of the conveying component.

[0015] The denitration system of the present application includes: a denitration feeding device, which is the denitration feeding device described in any one of the above; a coal-fired boiler, which has a flue gas passage, and the inlet of the denitration feeding device is connected to one end of the flue gas passage; a catalytic component, which is arranged at one end of the flue gas passage far from the denitration device.

[0016] The present application provides a denitration system, which is convenient for adjusting the feeding amount and improving the stability of denitration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Schematic diagram of a denitration feeding device provided by an embodiment of the present application;

[0019] Figure 2 Schematic diagram provided by an embodiment of the present application;

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] Storage bin 1, feeding assembly 2, feeding component 21, feeding wheel 211, convex block 212, vibration component 22

[0022] Transport component 3, transport part 31, pressure monitoring part 32, intake pipe 33, supercharging smoke machine 34, first pipe 35, second pipe 36, return air pipe 37,

[0023] Flow regulation part 4, compressed air source 5, grinding part 6,

[0024] Coal-fired boiler 7, smoke outlet channel 71, catalytic part 8. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0026] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. The terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. The terms "parallel", "perpendicular", and "equal" include the described situations and situations similar to the described situations, and the range of the similar situations is within the acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurement being discussed and the errors related to the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, and the acceptable deviation range of approximate parallel can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, and the acceptable deviation range of approximate perpendicular can also be, for example, within 5° deviation. "Equal" includes absolute equality and approximate equality, and the acceptable deviation range of approximate equality can be, for example, that the difference between the two equal ones is less than or equal to 5% of any one of them. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0027] To enable those skilled in the art of the present technology to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the accompanying drawings and specific embodiments.

[0028] This application provides a denitration feeding device, which includes a conveying component 3, a feeding component 2 and a storage bin 1. The feeding component 2 includes a plurality of feeding parts 21. The plurality of feeding parts 21 are arranged at intervals at the outlet of the discharging bin, and a preset distance is provided between the plurality of feeding parts 21. The outlet of the storage bin 1 faces the conveying component 3, and a feeding component 2 is provided at the outlet of the storage bin 1 to convey the materials in the storage bin 1 onto the conveying component 3. The conveying component 3 includes a conveying part 31 and a pressure monitoring part 32. The input end of the conveying part 31 faces the outlet of the feeding component 2, and the pressure monitoring part 32 is arranged on the conveying part 31 to monitor the weight of the received materials.

[0029] Specifically, as Figures 1 to 2 shown, the feeding component 2 is arranged below the storage bin 1. The feeding component 2 is adapted to output the denitration agent onto the conveying component 3. At the same time, the pressure monitoring part 32 of the conveying component 3 monitors the weight of the denitration agent. The feeding component 2 changes the output power by monitoring the weight of the denitration agent, and then adjusts the amount of materials output to the denitration part.

[0030] The feeding part 21 is arranged at the lower end of the storage bin 1 to convey the materials in the storage bin 1. The feeding part 21 includes a driving part and a feeding wheel 211. The feeding wheel 211 is arranged at the lower end of the storage bin 1. The driving part can be arranged outside the storage bin 1 and connected to the feeding wheel 211. The driving part drives the feeding wheel 211 to rotate so that the feeding wheel 211 rubs against the denitration agent. Under the double pressure of the inner wall surface of the storage bin 1 and the feeding wheel 211, the denitration agent is crushed and then falls onto the conveying component 3. There are raised blocks 212 on the feeding wheel 211. The raised blocks 212 are arranged in the circumferential direction of the feeding wheel 211. When the feeding wheel 211 rotates, the raised blocks 212 come into contact with the denitration agent to crush the denitration agent. The feeding part 21 pre-treats the denitration agent through the rotation of the feeding wheel 211 and the crushing action of the raised blocks 212, making it finer and more conducive to mixing more fully with the flue gas during the denitration process, thereby improving the denitration effect.

[0031] This application provides a denitration feeding device. Through the pressure monitoring part 32 of the feeding component 2 and the conveying component 3, the weight of the denitration agent is monitored in real time, and the feeding amount is adjusted according to needs to ensure the stability and efficiency of the denitration process. By setting the feeding part 21, it is avoided that the denitration agent caking causes unstable feeding amount. Moreover, the feeding part 21 pre-treats the denitration agent through the rotation of the feeding wheel 211 and the crushing action of the raised blocks 212, making it finer and more conducive to mixing more fully with the flue gas during the denitration process, thereby improving the denitration effect.

[0032] In some embodiments, the feeding assembly 2 further includes a vibration member 22. The vibration member 22 is connected to the storage bin 1, and the output end of the vibration member 22 extends into the storage bin 1. The vibration member 22 is any one of an ultrasonic transducer, a vibrator, or an air cannon. The vibration assembly vibrates the denitration agent in the storage bin 1 to prevent the denitration agent in the storage bin from arching and causing poor feeding.

[0033] The vibration member 22 can be any one of an ultrasonic transducer, a vibrator, or an air cannon, and is driven by a compressed air source 5. The compressed air source 5 is connected to the vibration member 22. A material guiding member 21 is arranged below the vibration member 22 to facilitate further feeding. When it is necessary to feed, that is, when feeding is required, the compressed air source 5 is started to provide power for the vibration member 22. The vibration member 22 starts to vibrate and transfers energy to the denitration agent. After being vibrated, the friction between the particles of the denitration agent decreases and its fluidity increases. At the same time, the material guiding member 21 starts to move, further promoting the feeding of the denitration agent. Under the combined action of vibration and the material guiding member 21, the denitration agent is smoothly output from the storage bin to the conveying assembly 3.

[0034] In the denitration device according to the embodiment of the present application, by providing the vibration member 22 to vibrate the denitration agent, it is avoided that the denitration agent is caked and causes unstable feeding of the denitration agent.

[0035] Further, the number of the vibration members 22 is multiple, and the multiple vibration members 22 are arranged at intervals in the vertical direction on the storage bin 1, thereby improving the vibration effect on the denitration agent and enhancing the stability and safety of vibration.

[0036] In some embodiments, the conveying member 31 is a chain conveyor. A pressure sensor can be provided on the chain plate of the chain conveyor to monitor the weight of the denitration agent on the chain conveyor. The chain plate can be used to carry and install the pressure sensor. For example, a groove can be provided on the chain plate to install the pressure sensor.

[0037] In some embodiments, the conveying assembly 3 further includes an intake pipe 33, a booster fan 34, a first pipe 35, a second pipe 36, and a return pipe 37. The output end of the booster fan 34 is connected to the inlet of the intake pipe 33. The outlet of the intake pipe 33 is respectively connected to one ends of the first pipe 35 and the second pipe 36. The other ends of the second pipe 36 and the first pipe 35 are connected to the return pipe 37, and the output end of the chain conveyor is connected to the first pipe 35 to input the material into the first pipe 35.

[0038] The pressurized smoke machine 34 is adapted to suck in flue gas from the coal-fired boiler 7. The pressurized smoke machine 34 outputs the flue gas into the intake pipe 33. The outlet of the intake pipe 33 is connected to the inlets of the first pipe 35 and the second pipe 36. The first pipe 35 is in the shape of "∩". Further, it is convenient to arrange the output end of the chain conveyor in the first pipe 35, and the output material drops downward along the up-and-down direction. Further, it is convenient to output the material into the return air pipe 37. The denitration agent and the flue gas are mixed in the return air pipe 37, facilitating the subsequent flue gas denitration reaction.

[0039] In some embodiments, the denitration feeding device further includes a flow regulating component 4. The flow regulating component 4 is arranged on the first pipe 35, and the flow regulating component 4 is arranged near one end of the connection between the first pipe 35 and the intake pipe 33.

[0040] Specifically, as Figures 1 to 2 shown, the flow regulating member is arranged at the inlet of the first pipe 35 to control the amount of the input flue gas. For example, the flow regulating member is a flow regulating valve, and the opening degree of the flow valve is controlled to control the input amount of the flue gas to match the amount of the denitration agent conveyed by the conveying component 3, improving the mixing efficiency of the flue gas and the denitration agent.

[0041] In some embodiments, the denitration feeding device further includes a grinding component 6. The grinding component 6 is arranged in the second pipe 36 or at the connection between the first pipe 35 and the return air pipe 37. The grinding component 6 is arranged below the connection between the output end of the chain conveyor and the first pipe 35 to grind the material.

[0042] Specifically, as Figures 1 to 2 shown, the grinding component 6 is arranged in the return air pipe 37 or at the connection between the first pipe 35 and the return air pipe 37 to grind the denitration agent input into the first pipe 35 and powder the denitration agent to improve the mixing efficiency of the flue gas and the denitration agent.

[0043] In some embodiments, the denitration feeding device further includes a temperature monitoring component. The temperature monitoring member is arranged on the first pipe 35 to monitor the temperature of the flue gas in the first pipe 35. The temperature monitoring component is installed in the first pipe 35 to measure the temperature of the flue gas, facilitating the monitoring of the temperature of the flue gas before mixing and avoiding the influence of too low or too high flue gas temperature on the mixing efficiency.

[0044] Further, the number of the pressure monitoring members 32 is multiple, and the multiple pressure monitoring members 32 are arranged at intervals in the width direction of the conveying component 31. By arranging multiple pressure monitoring members 32, the conveying speed of the chain conveyor, that is, the amount of the output material, can be adjusted according to the data of the multiple pressure monitoring members 32. For example, the speed of the chain conveyor is adjusted by taking the average value of the multiple pressure monitoring members 32, and further the mixing efficiency of the denitration agent and the flue gas is adjusted.

[0045] The denitrification system of the present application includes: a denitrification feeding device, a coal-fired boiler 7, and a catalytic component 8. The denitrification feeding device is the denitrification feeding device of any of the above, the coal-fired boiler 7 has a flue gas passage 71, the inlet of the denitrification feeding device is connected to one end of the flue gas passage 71, and the catalytic component 8 is arranged at the end of the flue gas passage 71 far from the denitrification device.

[0046] Specifically, as Figures 1 to 2 shown, the gas boiler has a flue gas passage 71. The booster fan 34 of the denitrification feeding device is connected to the flue gas passage 71 to pump the flue gas into the intake pipe 33. Then the intake pipe 33 passes the flue gas into the second pipe 36 and the first pipe 35, and then flows into the return pipe 37. The return pipe 37 is connected to the flue gas passage 71 to output the flue gas and the denitrification agent into the flue gas passage 71. Among them, the connection between the return pipe 37 and the flue gas passage is located downstream of the flue gas flow direction, and the connection of the booster fan to the flue gas passage is located upstream of the flue gas passage 71. The flue gas finally flows to the catalytic component 8 of the flue gas passage 71.

[0047] That is, after the flue gas burns in the boiler, it enters the denitrification feeding device through the flue gas passage 71, and the denitrification feeding device injects an appropriate amount of denitrification agent into the flue gas. The booster fan 34 pumps the flue gas containing the denitrification agent into the intake pipe 33, and then enters the second pipe 36 and the first pipe 35 for further mixing and reaction. The treated flue gas returns to the flue gas passage 71 through the return pipe 37 and continues to flow to the catalytic component 8. Under the action of the catalytic component 8, the denitrification reaction is carried out. The vibration component 22 and the feeding component 21 in the feeding device are adapted to vibrate and crush the denitrification agent for output, and then pre-treat the denitrification agent to make it finer, which helps to mix more fully with the flue gas during the denitrification process and improve the denitrification effect.

[0048] By means of the pressure monitoring component 32 arranged on the chain conveyor, the output power of the chain conveyor can be adjusted by monitoring the weight of the denitrification agent on the chain conveyor, and then the output amount of the denitrification agent can be adjusted to improve the mixing efficiency of the flue gas and the denitrification agent.

[0049] The present application provides a denitrification system. By arranging a chain conveyor and a pressure monitoring component 32, it is convenient to adjust the feeding amount and improve the stability of denitrification. The above has introduced in detail one provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A denitration feeding device, characterized in that, Comprising: A feeding component and a storage bin, the feeding component includes a plurality of feeding parts, the plurality of feeding parts are arranged at intervals at the outlet of the storage bin, and a preset distance is provided between the plurality of feeding parts; A conveying component, the outlet of the storage bin faces the conveying component, a feeding component is provided at the outlet of the storage bin to convey the materials in the storage bin onto the conveying component, the conveying component includes a conveying part and a pressure monitoring part, the input end of the conveying part faces the outlet of the feeding component, and the pressure monitoring part is arranged on the conveying part to monitor the weight of the received materials.

2. The denitration feeding device according to claim 1, characterized in that, The feeding component further includes a vibration component, the vibration component is connected to the storage bin, the output end of the vibration component extends into the storage bin, and the vibration component is any one of an ultrasonic transducer, a vibrator or an air cannon.

3. The denitration feeding device according to claim 2, characterized in that, The number of the vibration components is multiple, and the multiple vibration components are arranged at intervals in the vertical direction on the storage bin.

4. The denitration feeding device according to claim 3, characterized in that The conveying part is a chain conveyor.

5. The denitration feeding device according to claim 1, characterized in that, The conveying component further includes an intake pipe, a booster fan, a first pipe, a second pipe and a return pipe, the output end of the booster fan is connected to the inlet of the intake pipe, the outlet of the intake pipe is respectively connected to one ends of the first pipe and the second pipe, the other ends of the second pipe and the first pipe are connected to the return pipe, and the output end of the conveying part is connected to the first pipe to input materials into the first pipe.

6. The denitration feeding device according to claim 5, characterized in that, It further includes a flow regulating component, the flow regulating component is arranged on the first pipe, and the flow regulating component is arranged near one end of the connection between the first pipe and the intake pipe.

7. The denitration feeding device according to claim 6, wherein, It further includes a grinding component, the grinding component is arranged in the second pipe or at the connection between the first pipe and the return pipe, and the grinding component is arranged below the connection between the output end of the conveying part and the first pipe to grind the materials.

8. The denitration feeding device according to claim 5, characterized in that, It further includes a temperature monitoring component, the temperature monitoring part is arranged on the first pipe to monitor the flue gas temperature in the first pipe.

9. The denitration feeding device according to claim 1, characterized in that, The number of the pressure monitoring parts is multiple, and the multiple pressure monitoring parts are arranged at intervals in the width direction of the conveying part.

10. A denitration system, characterized in that, Comprising: a denitration feeding device, the denitration feeding device is the denitration feeding device according to any one of claims 1-9; a coal-fired boiler, the coal-fired boiler has a flue gas passage, and the inlet of the denitration feeding device is connected to one end of the flue gas passage; a catalytic component, the catalytic component is arranged at one end of the flue gas passage far from the denitration device.

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